We can only imagine the hissy fit Meredith Grey's going to throw when she hears about this! Derek Shepherd—aka McDreamy—aka Grey's Anatomy star Patrick Dempsey—will be seeing a lot of a certain Megan Fox, Variety reported.
The actor has revealed he's joining the cast of Paramount's Transformers 3, which Michael Bay will begin directing this month. Dempsey will play the boss of Fox's character, Mikaela Banes. Dempsey told reporters in Brazil this week that it's a "dark character."
Dempsey was last on the big screen in the 2008 romantic comedy Made of Honor.
The three-quel, which reteams Bay with Fox and Shia LaBeouf, is set to hit theaters July 1, 2011.